str="day day up"
for i in  range(len(str)):
    print(str[i],end=" ")

list1=[]
# list1[0]=1
# list1[1]=2
list1.append(3)
list1.append(4)
list1.append(5)
print(list1)
list3 = list(list1)
print(list3)

list2=[1,2,3]
# list1[0]=1
# list1[1]=2
# list2.append(3)
# list2.append(4)
# list2.append(5)

for i in list2:
    print(i)
list2.insert(1,2)
print(list2)
list2.extend([11,12])
print(list2)
# list2.sort(reverse=True)#默认升序
#print('---------')
# print(list2)

list3=sorted(list2)
print(list2)
print(list3)

del list3
print('++++++++++')
print(list3)

list4=range(1,3)
print(list4)

list5=[i for i in range(1,10) if i%2 !=0]
print(list5)

str =('1111')
print(type(str))

list5=[1,2,3,4,5]
set1=set(list5)
print(set1)
set1.pop()
print(set1)

dict1={}
print(type(dict1))